Sheet-metal v



(ModeL) 1. s. LAUBAOK.

SHEET METAL VESSEL. v i No. 317,807. Patented May 12, 1885..

WITNESSES a I MENTOR JJQVM BYJAMW ATTORNEYS.

lhvrrn STATES A'TENT rrica.

ISAAC S. LAUBAGK, OF BOSTON, MASSACHUSETTS.

SHEETQMETAL VESSEL.

SPECIFICATION forming part of Letters Patent 1\To.317,807, dated May 12,1885.

Application filed October 7, 1884. (Model) To all whom it may concern.-

Be it known that I, ISAAC S. LAUBAOK, of Boston, (East Cambridge,) inthe county of Middlesex and State of Massachusetts, have invented a newand useful Improvement in Sheet-Metal Vessels, of which the following isa full, clear, and exact description.

The invention relates to the securing of hottoms upon or to sheet-metalvessels; and the invention consists, principally, in forming the bottomintegral with a flange that forms the support or base of the vessel, andsecuring the bottom to the open end of the body of the vessel by a lapor folded joint that clinches the body and bottom of the vesseltogether. The bottom is by preference first made in the form of a basin,then folded or creased to receive the lower open end of the body of thevessel, the fold or crease containing the bottom edge of the vesselbeing then upset to form the joint.

Reference is to be had to .the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a sectional elevation of the bottom in basin form. Figs. 2and 3 illustrate the preferred method of creasing the bottom, and Fig. 3shows also, the body of the vessel ready to be placed in the bottom.Figs. 4 and 5 illustrate two lllGllllOtlS of upsetting the crease andedge of the body of the vessel to form the joint; and Fig. 6 is asectional plan view of a completed vessel, taken on the line :0 a: ofFig. 4.

a represents the open body of a vessel. b represents the bottom of thevessel; 0, the flange or base, and d represents the joint that unitesthe bottom and body. The bottom I) is by preference made in the form ofa basin-*that is, integral with the flange or base a, the whole being bypreference struck from a suitable blank of sheet metal. The bottom b isthen creased, as shown at c. This may be 7 formed without the use ofsolder.

done by first depressing the bottom, as shown in Fig. 2, over a hollowtool or mandrel that supports the edgef of the bottom, and thenelevating the bottom again flush, or nearly so, with the edgef, as shownin Fig. 3, a hollow tool or mandrel being used to support the lower edgeor fold of the crease e. The crease 6 being thus formed, the lower edgeof the body a will be placed in the crease e, as illus trated in Fig. 3,and then both the crease e and lower edge of the body of the vessel areoverturned or upset either toward the center of the bottom 12, as shownin Fig. 4, or toward the base a, as shown in Figaaa The upsetting isdone by crushing down or folding over the crease eand the lower edgeofthe body a, to form a lip or flange, a, at the lower edge of the bodya, which will be clinched both above and below by the folding of thecrease 6, so that a perfectly water tight joint is The upsetting may bedone by hand or machinery.

Besides the advantage of forming a watertightjoint without the use ofsolder or rivets, by my invention the vessel is made cheaper andstronger at the bottom than vessels heretofore manufactured, and thesupport or base 0 is formed solid with the bottom and without extrawork.

Having thus described my invention, I claim as new and desire to securebyLetters Patent 1. The combination, with the body, of the bottom b,formed integral with the flange c, and attached to the body by thefolded joint d, thus making the vessel with a base complete of twopieces, substantially as set forth.

2. The bottom I), made integral with the flange c, and having the crease6 formed in it, substantially as and for the purposes set forth.

ISAAC S. LAUBACK.

Witnesses:

BENJ. V. COBURN, J onn W. RICHMOND.

